Sliding mechanism and portable electronic device using the same

1. A sliding mechanism, comprising: a base plate; a sliding plate slidably assembled with the base plate and located upon the base plate; a connecting plate hinged to the sliding plate and configured to be located above the corresponding sliding plate when in a closed configuration and be rotated to form an angle with the sliding plate; a support plate with two ends thereof rotatably coupling with the connecting plate and the base plate respectively, the support plate configured to be operatably lied on the base plate when in a closed configuration and form an angle with the base plate to support the corresponding connecting plate; and an elastic assembly elastically held between the base plate and the sliding plate to exert a force on the sliding plate and the base plate, causing the sliding plate to slide along two guiding rails of the base plate, wherein the elastic assembly includes two arcuate band springs with different radius of curvature, the two arcuate band springs assembled together to form a closed arcuate elastic assembly, and the two ends of the elastic assembly respectively coupled to the base plate and the sliding plate.

2. The sliding mechanism as claimed in claim 1 , wherein the base plate includes the two guiding rails formed at two opposite ends thereof respectively; the sliding plate defines two opposite sliding slots corresponding to and engaging with the two guiding rails of the base plate respectively.

3. The sliding mechanism as claimed in claim 2 , wherein the base plate defines an assembling hole therethrough, and the sliding plate defines a mounting hole therethrough; the ends of each band spring are curled to form a ring shaped connecting end; the elastic assembly further includes two connecting posts respectively penetrating the corresponding two connecting ends of the spring and fixed to the corresponding assembling hole of the base plate and the mounting hole of the sliding plate.

4. The sliding mechanism as claimed in claim 1 , wherein the base plate includes two first pin barrels spaced disposed at one side thereof and thereby forming a first coupling gap between the two first pin barrels; the support plate includes a coupling barrel formed at one end thereof corresponding to the first coupling gap of the base plate, the pin barrel of the support plate engages within the coupling gap and aligns with the two first pin barrels such that, the support plate are respectively rotatably hinged with the base plate by one connecting pin.

5. The sliding mechanism as claimed in claim 4 , wherein the sliding plate includes several second pin barrels spaced disposed on a hinged portion thereof and thereby forming several hinged gaps therebetween; the connecting plate includes several third pin barrels spaced disposed on one side thereof and configured for engaging with the corresponding hinged gaps of the sliding plate; such that, the sliding plate is hinged to the connecting plate by a connecting pin.

6. The sliding mechanism as claimed in claim 5 , wherein the connecting plate further includes two hinged spaced barrels formed on the opposite other side of the coupling portion to the hinged barrels and thereby forming a second coupling gap therebetween; the support plate further includes another coupling barrel formed at the other end thereof, and configured to engage within the second coupling gap and align with the two hinged barrels; a connecting pin penetrate through the two hinged barrels and the coupling barrel to hinge the support plate to the connecting plate.

7. The sliding mechanism as claimed in claim 1 , wherein the sliding plate includes a resisting block protruding therefrom and configured to resist against the connecting plate and prevent the connecting plate running away from the sliding plate freely.

8. A portable electronic device, comprising: a base body; a cover body; and a sliding mechanism slidably connected between the base body and the cover body; the sliding mechanism, comprising: a base plate fixed to the base body; a sliding plate slidably assembled with the base plate, and located upon the base plate; a connecting plate hinged to the sliding plate and fixed with the corresponding cover body; the connecting plate configured to be located above the corresponding sliding plate when in a closed configuration and be rotated together with the cover body to form an angle with the sliding plate; a support plate with two ends thereof rotatably coupling with the connecting plate and the base plate respectively, the support plate configured to be operatably lied on the base plate when in a closed configuration and form an angle with the base plate to support the corresponding connecting plate and the cover body; and an elastic assembly elastically held between the base plate and the sliding plate to exert a force on the sliding plate and the base plate, causing the sliding plate to slide along two guiding rails of the base plate, wherein the elastic assembly includes two arcuate band springs with different radius of curvature, the two arcuate band springs assembled together to form a closed arcuate elastic assembly, and the two ends of the elastic assembly respectively coupled to the base plate and the sliding plate.

9. The portable electronic device as claimed in claim 8 , wherein the base plate includes the two guiding rails formed at opposite ends thereof; the sliding plate defines two opposite sliding slots corresponding to and engaging with the two guiding rails of the base plate respectively.

10. The portable electronic device as claimed in claim 8 , wherein the base body includes a key board having keys disposed thereon, the cover body includes a display disposed thereon; the key board hides under the cover body when the portable electronic device is in a closed configuration and is exposed when the portable electronic device is in an opened configuration.

11. The portable electronic device as claimed in claim 9 , wherein the base plate defines an assembling hole therethrough, and the sliding plate defines a mounting hole therethrough; each end of each band spring are respectively curled to form a ring shaped connecting end; the elastic assembly further includes two connecting posts respectively penetrating the corresponding two connecting ends of the spring and fixed to the corresponding assembling hole of the base plate and the mounting hole of the sliding plate.